sed replace and keep double quotes

Question

I just want to change the server and IP information inside double quotes.

For Example: original line:

"server":"10.10.10.10:3306"

OR

"server":"localhost:3306"

output line:

"server":"20.20.20.20:3306"

I tried using...

sed -i s/.*/\"server\"\:\"20\.20\.20\.20\:3306\"/

output:

server:20.20.20.20:3306

where all double quoest gone? it replaces the values but does not keep double quotes. I want it should not change double quotes.

Any help?

Answer 1

You need to enclose the sed pattern within single quotes. If you do like that, then you don't need to escape the double quotes.

$ echo '"server":"10.10.10.10:3306"' | sed 's/.*/"server":"20.20.20.20:3306"/'
"server":"20.20.20.20:3306"

OR

You could simply do like this,

$ echo '"server":"10.10.10.10:3306"' | sed 's/[^":]\+:/20.20.20.20:/'
"server":"20.20.20.20:3306"
$ echo '"server":"localhost:3306"' | sed 's/[^":]\+:/20.20.20.20:/'
"server":"20.20.20.20:3306"